How can i ungroup models for example i have 2 chair that they are in the same group model and i want to move one off those and they both moves

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how can i ungroup models for example i have 2 chair that they are in the same group model and i want to move one off those and they both moves

2

The easiest way is to select the group and press Shift+G.

More info here: Grouping Actors | Unreal Engine Documentation